From 7751d487ed24f95fc29915803c0eae53a554eb6a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Florian=20L=C3=BCke?= <f.lueke@mesytec.com>
Date: Wed, 25 Dec 2024 03:19:00 +0100
Subject: [PATCH] math: add make_quiet_nan()

---
 include/mesytec-mnode/mnode_math.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/mesytec-mnode/mnode_math.h b/include/mesytec-mnode/mnode_math.h
index a9693c2..0119f8e 100644
--- a/include/mesytec-mnode/mnode_math.h
+++ b/include/mesytec-mnode/mnode_math.h
@@ -2,6 +2,7 @@
 #define C536E080_25D7_476D_B8E3_25912B9CFC3B
 
 #include <cstdint>
+#include <limits>
 
 namespace mesytec::mnode
 {
@@ -13,6 +14,13 @@ inline int64_t round_up(int64_t n, int64_t p)
     return (n + mask) & ~mask;
 }
 
+inline double make_quiet_nan()
+{
+    double result = std::numeric_limits<double>::quiet_NaN();
+    assert(((uintptr_t)(result) & 0xffffffff) == 0);
+    return result;
+}
+
 }
 
 #endif /* C536E080_25D7_476D_B8E3_25912B9CFC3B */